powerpc: Perform an isync to synchronize CPUs coming out of secondary_hold
We need to do that to guarantee they see any code change done by dynamic patching during boot. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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@ -147,6 +147,8 @@ __secondary_hold:
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mtctr r4
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mr r3,r24
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li r4,0
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/* Make sure that patched code is visible */
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isync
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bctr
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#else
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BUG_OPCODE
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